From Taika Waititi's instagram.
>Thor is still the main character of the movie, for those worried he would play second fiddle to Jane Foster. He will keep Stormbreaker and Jane will get Mjolnir.
>Christian Bale is playing the “intergalactic” main villain, who requires mocap. Rumors point to either Gorr or Dario Agger. It’s worth noting that comics Agger is not alien, while Gorr is, and that Starsharks showed up in the same story arc where Gorr was introduced.
>Thor will be fit again, but they might include fat Thor in some capacity because Chris Hemsworth really likes playing that.
>Waititi is interested in Jane’s cancer storyline from the comics, but is not sure whether he will include it in the movie.
>Waititi wouldn’t reveal whether Loki will appear in the movie or not (which means he probably will).
>Waititi would really like to use Beta Ray Bill, but his presence is “up in the air” at the moment.
>Casting is underway for a young African-American/Black-British boy named “Zappa”, who will have a major role. There are rumors that he could be a reborn Heimdall.
>Valkyrie will return and the movie will explore her sexuality and give her a female love interest.
>Korg and Miek will return and have actual jobs in New Asgard. Also, Miek is female and will get a new exoskeleton.
>The Guardians of the Galaxy will appear, and Rocket and Groot will have sizeable roles.
>The Starsharks and Korg’s species, the Kronans, will appear.
>Dio’s “Rainbow in the Dark” will be feature in the movie.
>The movie is so crazy that it makes THOR: RAGNAROK look safe. Hemsworth said it is one of the best scripts he’s ever read.